# Tesla plans Megapack 3 and Megablock production at Houston, targeting 50 GWh/year

Canonical page: https://technooptimist.io/stories/tesla-plans-megapack-3-and-megablock-production-at-houston-targeting-50-aa896aca
Date: Q4 2026
About: [Tesla](https://technooptimist.io/companies/tesla.md) · [Megapack 3 / Megablock](https://technooptimist.io/energy/megapack-3.md)
Original source: https://www.basenor.com/blogs/news/teslas-texas-megapack-factory-megapack-3-production-starts-2026

Tesla plans to build Megapack 3 and Megablock grid batteries at its Houston Megafactory, with a capacity target of 50 GWh a year. Its earlier guidance put the start of production in late 2026, and no source reviewed confirms that production has begun. Megapack 3 units are about 5 MWh each, and a Megablock packages four of them into one 20 MWh block.

## Key facts

- Tesla said it plans to start Megapack 3 production in Houston in late 2026 (Electrek, 8 Sep 2025).
- TechCrunch reported that both products would not enter production until the latter half of 2026 (9 Sep 2025).
- Target: 50 GWh of annual capacity.
- Megablock adds a transformer and switchgear to four units, for 20 MWh per package.
- As of 15 Oct 2026 the start of production is not confirmed in the sources checked.

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